Safety control for gasoline dispensing systems



y 5, 1932- A c. MANDEL SAFETY CONTROL FOR GASOLINE DISPENSING SYSTEMSFiled May 16, 1930 AH/wr C. Mandel INVENTOR.

BY Wm? WM A TTORNEY.

Patented July 5, 1932 PATENT; OFFICE ARTHUR C. MANDEL, OF NEW YORK, N.Y.

SAFETY CONTROL FOR GASOLINE DISPENSING SYSTEMS Application filed May 16,1930. Serial No. 452,884.

This invention relates to safety devices for gasoline dispensing systemsand has for its particular object the provision of dual means ordispensing gasoline for the purpose ofcompelling two distinct manualoperations to be performed in order to start the mechanism of thesystem. The invention is an improvement over one disclosed in aco-pending application Serial #398,669 filed by me on October 10, 1929.

The invention consists briefly in an electrical switch unit which canonly be closed to start the pumping mechanism, after the hose nozzle hasbeen removed off its supporting F hook. and after this hook has beenraised manually to remove a switch look. A second manual operation,namely the moving of the hose itself forward while dispensing thegasoline, then actually throws over the switch lever thereby closing thesame.

In the drawing,

Fig. 1 is an elevational view showing a dispensing mechanism, with itscover removed, embodying a preferred form of my invention;

Fig. 2 is a fragmentary vertical sectional viedw along the plane of line2-2 in Fig. 1; an

Fig. 3 is a fragmentary horizontal sectional view along the plane ofline 33 in Fig. 1.

Like characters of reference denote similar parts throughout the severalviews and the following specification.

is a panel upon which is supported a meter 11 which is connected bysuitable piping 12 to a motor driven pump 12a. The mechanism iscustomarily covered with a housing mounted uponthe panel 10 which,however, for sake of clearness, has been omitted from the drawing.Piping 12 projects beyond the panel 10 and externally of the housing andhas connected to it a discharge hose 14.

15 is a shut-off valve, preferably of the well known gate valve type,located within the housing and in the piping 12. Fulcrumed on the valveat 13 and serving as its operating handle is a lever 16, having itslower end projecting outside of the housing and formed like a hook at 17for the reception and support of a hose nozzle 18 which is attached tothe end of the hose 14. Nozzle 18 is of the usual construction wellknown in the art and includes, preferably, a nozzle valve 19 operated byan arm 20.

21 is an electrical switch unit, operably connected to the motor 21adriving the pump. The switch is actuated by a lever 22 fulcrumed at 23to the switch and has a weight 22a angularly disposed with respect tothe lever 22.

The upper part of the lever 16 is curved and extends parallel to theswitch lever 22 where it terminates in a pin 24 at right angles to itimmediately adjacent lever 22 and in back 05 o it.

25 is an operating bar pivoted about a fulcrum 26 supported upon abracket 27. This bar has one end 28 terminating immediately in front ofthe switch lever 22 and its other end 29 is bolted or otherwise securedto a hose clamp 30 fitted to the discharge hose 14. The end 29 of thebar is disposed at an angle away from the fulcrum 26 to where itconnects to the clamp 30. 7

The operation of the device is as follows:

When dispensing gasoline, the hose nozzle 18 is taken off the end oflever 16. Lever 16 is then pushed upwards manually which opens theshut-off valve 15 and simultaneously moves the pin 24 away from itsposition in back of switch lever 22 to the one shown in dotted lines inFig. 2. The operator then directs the hose nozzle 18 to the tank orother receptacle to be filled and in doing so moves the hose 14 forwardof the panel into the position shown in dotted lines in Fig. 3. Thistrips the switch lever 22 over, the pin 24 which normally preventstripping of the lever having been removed from a locking position asjust now described. The closing of the switch then starts the motor ofthe pump and forces gasoline through the meter into the discharge hose14 and out through nozzle 18. As soon as the nozzle 18 is replaced uponthe hook 17 at the lower end of lever 16, the weight of the nozzleforces the lever 16 back to its original position which pushes theswitch lever 22 back to open the switch which action nozzle at one endand means to obstruct operis assisted by the weight 22a and the usualretractile spring provided for within the switch housing. The dischargehose 14 which then resumes its vertical position alongside of the panel10 again brings the pin 24 directly in back of switch lever 22 thusefiectively locking it.

Attention is particularly called to the fact that putting the pump motorin operation requires two distinct manipulations, first, taking the hosenozzle ofi its support, and secondly, raising the support hook to removethe locking pin in back of the switch lever. In addition to thesemanipulations, it is necessary to give the hose itself a forwardmovement to actually trip the switch lever. The possibility of theswitch being closed accidentally is thus entirely eliminated. The actualopening and closing of the switch is accomplished by the movement of thehose only and then only after the nozzle has been taken off and itssupport moved up manually. While I have shown a .pivotally supportedlocking bar, any other form of connection between hose and switch levermay, of course be employed, such as for instance a bar not pivotallysupported having one end fastened to the hose and its other end fittedloosely over i the switch lever. Moreover, the lever 16 need notnecessarily be pivoted to the shut-01f valve but may be fulcrumed on anindependent bracket, and the shut-off valve may be operated manuallyalso independently.

It is obvious, of course, that various kinds of switches and means forclosing them may be employed in the successful execution of theprinciples of m invention and that many chan es in the orm, proportionand minor detai s may be resorted to without sacrificing any of theadvantages of the invention as defined in the appended claims.

What I claim as new is:

1. The combination in a gasoline dispensing system of an operatingswitch, a dis charge hose, a hose nozzle, a pivotally supported leverhaving a support for the said ation of the said switch at the other, thesaid lever being adapted to be raised manually to unlock the saidswitch, and means to open and close the said switch comprising a bar inoperative connection with the said switch and fastened to the said hose.

2. The combination in a gasoline dispensing system of an operatingswitch, a discharge hose, a hose nozzle, a support for the said nozzle,means to obstruct operation of the said switch in operable connectionwith the said support and adapted to release the said switch by manualraising of the said support, and means to open and,close the said switchcomprising a bar in operative connection with the said switch andfastened to the said hose.

3. The combination in a gasoline dispensing system of an operatingswitch, a weighted lever for operating the said switch adapted tonormally maintain the switch in an open position, a discharge hose, ahose nozzle, a pivotally supported lever, having a support for the saidnozzle at one end, its other end terminating alongside the said switchlever and being adapted to be raised manually for moving the other endof the said pivotally supported lever away from its position alongsidethe said switch lever, apivotally supported operating bar, having oneend connected to the said discharge hose, and its other end terminatingadjacent the said switch lever, adapted to be rotated by a 'forwardmovement of the said hose and throw the said switch lever into a closedposition after the said pivotally supported lever has been raisedmanually.

In testimony whereof I have hereunto set my hand.

ARTHUR C. MANDEL.

